Considering economies of scale and adjacent infrastructure works in water main renewal planning

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Conference10th International Conference on Computing and Control for the Water Industry - CCWI 2009 Conference: 01 September 2009, Sheffield, UK
Pages17; # of pages: 7
SubjectWater mains
AbstractOptimal strategies for scheduling rehabilitation and/or replacement of water mains can generally be classified as high-level planning of groups or cohorts of pipes, or low-level scheduling of individual water mains, which is the subject of this paper. An approach is proposed for the efficient scheduling of replacement of individual water mains. The approach receives as input the expected number of breaks forecasted for each pipe in a short to medium planning period. The present value (PV) of all costs that are associated with each individual pipe is computed and good candidate pipes for replacement within the planning period are identified. Candidate replacement policies are formulated, including economies of scale considerations as well as coordination with other known infrastructure works. A multi-objective genetic algorithm scheme is used as a tool to search a vast combinatorial solution space for feasible solutions that minimise PV of cost as well as maximise usage of available budgets. Various budget scenarios can also be considered, including global budget for the planning period as well as series of annual budgets for each year in the planning period.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number52639
NPARC number20374272
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Record identifierb12b71c6-318e-4d9a-9ee6-43326812f8ae
Record created2012-07-23
Record modified2016-05-09
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